Math Question: What is the 3rd order derivative of f(x) = 2x^3 - 4x^2 + 5x - 3?
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Math question: Find the derivative of f(x) = 3sin(2x)cos(5x) + 4tan^2(x) at x = π/6.
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Math Question: Find the missing side length in a right triangle with an adjacent side of 5 units, an angle of 30 degrees, and an opposite side length of x.